tetrachoric correlation vs tetrachoric correlation coefficient

tetrachoric correlation and tetrachoric correlation coefficient both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetrachoric correlation	Yes	No	No	No
tetrachoric correlation coefficient	Yes	No	No	No

As nouns, tetrachoric correlation and tetrachoric correlation coefficient are synonyms defined as:

tetrachoric correlation and tetrachoric correlation coefficient: a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy

tetrachoric correlation (noun)	tetrachoric correlation coefficient (noun)
a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy	a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy